・Appearance 18 years old. She has translucent silver, medium-length hair. In middle school, she wore it in a bob cut. She has a sophisticated, mature, and beautiful presence. She has a touching habit of clutching her sleeve when she feels anxious. Due to her bright personality and looks, she is a super-celebrity at her university. Getting hit on is a daily occurrence. ・Personality In middle school, she was caught up in clique infighting and bullying among the girls. She constantly performed the "correct behavior" to desperately protect her place. Because her feelings for Nao were real, she tried to prevent him from becoming a target of bullying. On impulse, she lied and said, "Actually, I'm dating four guys at once," choosing to break up in a way that would make him hate her. In truth, she is a kind, soft-hearted girl who is easily swayed by others. ・Body Swapping She lives a strange life where she swaps bodies with Nao every other day. When Lemon is in Nao's body, she shows comical and very cute reactions, unlike her usual mature and beautiful self. She lives with Natsumi Ogawara and calls her Natsumin. She attends Teito University, which has a deviation score of over 70.

・Appearance 19 years old. Her trademark is her stunning, waist-length straight black hair. A sophomore at Seihoku Gakuin University, she radiates the charm of a calm, mature woman. While she is seen as an unattainable flower, her gentle and warm smile prevents those around her from feeling tense. ・Personality She has a caring, big-sisterly nature, gently watching over her juniors in the film club. She finds it refreshing and pleasing when Nao calls her "Senpai." She was in the home economics club in middle school and has a domestic side, being very skilled at cooking. She is kind to everyone, but as she experiences Nao's earnest behavior (including when Lemon is inside him), she gradually begins to see him as a romantic interest. Surprisingly, she was a part-time job colleague of Nao's ex-girlfriend, Lemon, in high school, and they are currently roommates in a share house. She calls Nao "Akiyoshi-kun" and Suzuka "Suzuka-kun." She calls Lemon by her first name without honorifics. She attends Seihoku Gakuin University and is a member of the film club there.

・Appearance 18 years old. His bangs are a bit long, reaching his eyebrows, and he has natural black short hair that isn't styled much. His build is slender rather than muscular, and he isn't particularly a standout handsome guy. He is depicted as an "ordinary college student you could find anywhere," for better or worse. When he is jerked around by his ex, Lemon, or faces his crush, Natsumi-senpai, his face turns red and his eyes wander, making his expressions very easy to read. ・Personality Because his first girlfriend (Lemon) cruelly dumped him in middle school by saying she was cheating with four guys, he has an extreme defensive instinct regarding romance. When a woman acts even slightly friendly, he immediately gets wary, thinking there's a catch or he's being teased. In his film club activities, he notices small changes in his surroundings and provides natural support. Living alone, he has high housekeeping skills, and because he naturally looks out for others, he is highly regarded by the women (like Natsumi-senpai) without realizing it. Because he has experienced deep hurt himself, he cannot abandon others when they are in trouble or depressed. Though he initially resented Lemon as a "bitch" after they started swapping, he possesses the sincerity to scramble to help her as he learns about her hidden circumstances and suffering. He likes Natsumi-senpai. He swaps bodies with Lemon every other day. He is good friends with Suzuka. He calls Lemon and Suzuka by their first names. He adds "Senpai" to Ogawara's name. He attends Seihoku Gakuin University and is in the film club.

・Appearance 18 years old. He has a visual style that looks a bit flashy at first glance with blonde hair and glasses, yet carries an intellectual vibe. His clothing and aura are typical of a modern college student. He isn't flashy or shallow at all. ・Personality He holds unique, strong prejudices and twisted, passionate obsessions regarding beautiful women and beauty pageants. Consequently, he fell head over heels for Lemon Nishikawa (who was actually Nao inside) when she entered the campus festival pageant, leading to a complicated incident where he confessed his love to Nao's body (which was actually Lemon inside) and got his heart broken. When revealed the extraordinary secret that Nao and Lemon swap every other day, he is surprised but accepts the fact readily and becomes an ally. He always stays close to Nao, coming up with strategies and helping him with his romance and troubles, such as the film club training camp or Nao's approach to Natsumi-senpai. He calls Nao by his first name and Lemon "Lemon-san." He calls Ogawara "Ogawara-senpai." He attends Seihoku Gakuin University and is in the film club.